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Grachev MK, Kurochkina GI, Popkov AV. The features of synthesis and chemical behavior of some silicon-containing cyclodextrin derivatives. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2477-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kaur H, Kaur M, Walia PK, Kumar M, Bhalla V. Encapsulating Au-Fe 3 O 4 Nanodots into AIE-active Supramolecular Assemblies: Ambient Visible-light Harvesting "Dip-Strip" Photocatalyst for C-C/C-N Bond Formation Reactions. Chem Asian J 2018; 14:809-813. [PMID: 30480366 DOI: 10.1002/asia.201801556] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/24/2018] [Indexed: 12/26/2022]
Abstract
The present study demonstrates the development of a supramolecular porous ensemble consisting of hetero-oligophenylene derivative 6 and Au-Fe3 O4 nanodots. Supramolecular assemblies of AIE-active hetero-oligophenylene derivative 6 served as reactors for the generation of Au-Fe3 O4 nanodots. The as prepared supramolecular ensemble functioned as an efficient recyclable photocatalytic system for C(sp2 )-H bond activation of anilines for the construction of quinoline carboxylates. Interestingly, the "dip catalyst" prepared by depositing PTh-co-PANI-6: Au-Fe3 O4 nanodots on a filter paper served as a recyclable strip (up to 10 cycles) for C-C/C-N bond formation reaction.
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Affiliation(s)
- Harpreet Kaur
- Department of Chemistry, UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Mandeep Kaur
- Department of Chemistry, UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Preet Kamal Walia
- Department of Chemistry, UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Manoj Kumar
- Department of Chemistry, UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Vandana Bhalla
- Department of Chemistry, UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar, Punjab, India
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Grachev MK, Kurochkina GI, Levina II, Popkov AV. Silylation of β-cyclodextrin by various chlorosilanes. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1354214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. K. Grachev
- Biology and Chemistry Institution of Moscow State University of Education, Moscow, Russian Federation
| | - G. I. Kurochkina
- Biology and Chemistry Institution of Moscow State University of Education, Moscow, Russian Federation
| | - I. I. Levina
- N.M.Emanuel Institution of Biochemical Physics of Russian Academy of Sciences, Moscow, Russian Federation
| | - A. V. Popkov
- Biology and Chemistry Institution of Moscow State University of Education, Moscow, Russian Federation
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Grachev MK, Popkov AV, Levina II, Kurochkina GI. Silylation of 2-hydroxypropyl-β-cyclodextrin. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217070155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kaur M, Pramanik S, Kumar M, Bhalla V. Polythiophene-Encapsulated Bimetallic Au-Fe3O4 Nano-Hybrid Materials: A Potential Tandem Photocatalytic System for Nondirected C(sp2)–H Activation for the Synthesis of Quinoline Carboxylates. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02681] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Mandeep Kaur
- Department of Chemistry,
UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Subhamay Pramanik
- Department of Chemistry,
UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Manoj Kumar
- Department of Chemistry,
UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Vandana Bhalla
- Department of Chemistry,
UGC Sponsored Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar 143005, Punjab, India
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Farcas A, Tregnago G, Resmerita AM, Aubert PH, Cacialli F. Synthesis and photophysical characteristics of polyfluorene polyrotaxanes. Beilstein J Org Chem 2015; 11:2677-88. [PMID: 26877789 PMCID: PMC4734422 DOI: 10.3762/bjoc.11.288] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 12/04/2015] [Indexed: 11/23/2022] Open
Abstract
Two alternating polyfluorene polyrotaxanes (3·TM-βCD and 3·TM-γCD) have been synthesized by the coupling of 2,7-dibromofluorene encapsulated into 2,3,6-tri-O-methyl-β- or γ-cyclodextrin (TM-βCD, TM-γCD) cavities with 9,9-dioctylfluorene-2,7-diboronic acid bis(1,3-propanediol) ester. Their optical, electrochemical and morphological properties have been evaluated and compared to those of the non-rotaxane counterpart 3. The influence of TM-βCD or TM-γCD encapsulation on the thermal stability, solubility in common organic solvents, film forming ability was also investigated. Polyrotaxane 3·TM-βCD exhibits a hypsochromic shift, while 3·TM-γCD displays a bathochromic with respect to the non-rotaxane 3 counterpart. For the diluted CHCl3 solutions the fluorescence lifetimes of all compounds follow a mono-exponential decay with a time constant of ≈0.6 ns. At higher concentration the fluorescence decay remains mono-exponential for 3·TM-βCD and polymers 3, with a lifetime τ = 0.7 ns and 0.8 ns, whereas the 3·TM-γCD polyrotaxane shows a bi-exponential decay consisting of a main component (with a weight of 98% of the total luminescence) with a relatively short decay constant of τ1 = 0.7 ns and a minor component with a longer lifetime of τ2 = 5.4 ns (2%). The electrochemical band gap (ΔEg) of 3·TM-βCD polyrotaxane is smaller than that of 3·TM-γCD and 3, respectively. The lower ΔEg value for 3·TM-βCD suggests that the encapsulation has a greater effect on the reduction process, which affects the LUMO energy level value. Based on AFM analysis, 3·TM-βCD and 3·TM-γCD polyrotaxane compounds exhibit a granular morphology with lower dispersity and smaller roughness exponent of the film surfaces in comparison with those of the neat copolymer 3.
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Affiliation(s)
- Aurica Farcas
- Supramolecular Chemistry Group, ''Petru Poni'' Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, 700487-Iasi, Romania
| | - Giulia Tregnago
- London Centre for Nanotechnology and Department of Physics and Astronomy University College London, Gower Street, London WC1E 6BT, UK
| | - Ana-Maria Resmerita
- Supramolecular Chemistry Group, ''Petru Poni'' Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, 700487-Iasi, Romania
| | - Pierre-Henri Aubert
- Laboratoire de Physicochimie des Polymères et des Interfaces (EA 2528), Institut des Matériaux, Université de Cergy-Pontoise, F-95031 Cergy-Pontoise Cedex, France
| | - Franco Cacialli
- London Centre for Nanotechnology and Department of Physics and Astronomy University College London, Gower Street, London WC1E 6BT, UK
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Ghimpu L, Potlog T, Resmerita AM, Tiginyanu I, Farcas A. Structure and morphology of nanoporous zno and dark current-Voltage characteristics of the glass/(TCO)/zno/poly[2,7-(9,9-dioctylfluorene)- alt-(5,5'-bithiophene)/ag structure. J Appl Polym Sci 2015. [DOI: 10.1002/app.42415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lidia Ghimpu
- Institute of Electronic Engineering and Nanotechnologies; Academy of Sciences of Moldova; MD-2028 Chisinau Republic of Moldova
| | - Tamara Potlog
- Moldova State University; Chisinau MD-2009 Republic of Moldova
| | - Ana-Maria Resmerita
- ‘‘Petru Poni’’ Institute of Macromolecular Chemistry; Gr. Ghica Voda Alley 41A 700487 Iasi Romania
| | - Ion Tiginyanu
- Institute of Electronic Engineering and Nanotechnologies; Academy of Sciences of Moldova; MD-2028 Chisinau Republic of Moldova
| | - Aurica Farcas
- ‘‘Petru Poni’’ Institute of Macromolecular Chemistry; Gr. Ghica Voda Alley 41A 700487 Iasi Romania
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Farcas A, Resmerita AM, Aubert PH, Ghosh I, Cantin S, Nau WM. Synthesis, Photophysical, and Morphological Properties of Azomethine-Persylilated α-Cyclodextrin Main-Chain Polyrotaxane. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201400543] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Aurica Farcas
- “P. Poni” Institute of Macromolecular Chemistry; 41A Gr. Ghica Voda Alley Iasi 700487 Romania
| | - Ana-Maria Resmerita
- “P. Poni” Institute of Macromolecular Chemistry; 41A Gr. Ghica Voda Alley Iasi 700487 Romania
| | - Pierre-Henri Aubert
- Laboratoire de Physicochimie des Polymères et des Interfaces; Institut des Matériaux; Université de Cergy-Pontoise; 5 Mail Gay Lussac Neuville sur Oise 95031 Cergy-Pontoise Cedex France
| | - Indrajit Ghosh
- Jacobs University; School of Engineering and Science; D-28759 Bremen Germany
| | - Sophie Cantin
- Laboratoire de Physicochimie des Polymères et des Interfaces; Institut des Matériaux; Université de Cergy-Pontoise; 5 Mail Gay Lussac Neuville sur Oise 95031 Cergy-Pontoise Cedex France
| | - Werner M. Nau
- Jacobs University; School of Engineering and Science; D-28759 Bremen Germany
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Farcas A, Aubert PH, Mohanty J, Lazar AI, Cantin S, Nau WM. Molecular wire formation from poly[2,7-(9,9-dioctylfluorene)-alt-(5,5′-bithiophene/cucurbit[7]uril)] polyrotaxane copolymer. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2014.11.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Farcas A, Resmerita AM, Aubert PH, Farcas F, Stoica I, Airinei A. The effect of permodified cyclodextrins encapsulation on the photophysical properties of a polyfluorene with randomly distributed electron-donor and rotaxane electron-acceptor units. Beilstein J Org Chem 2014; 10:2145-56. [PMID: 25246973 PMCID: PMC4168896 DOI: 10.3762/bjoc.10.222] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 08/19/2014] [Indexed: 11/23/2022] Open
Abstract
We report on the synthesis as well as the optical, electrochemical and morphological properties of two polyrotaxanes (4a and 4b), which consist of electron-accepting 9,9-dicyanomethylenefluorene 1 as an inclusion complex in persilylated β- or γ-cyclodextrin (TMS-β-CD, TMS-γ-CD) (1a, 1b) and methyltriphenylamine as an electron-donating molecule. They are statistically distributed into the conjugated chains of 9,9-dioctylfluorene 3 and compared with those of the corresponding non-rotaxane 4 counterpart. Rotaxane formation results in improvements of the solubility, the thermal stability, and the photophysical properties. Polyrotaxanes 4a and 4b exhibited slightly red-shifted absorption bands with respect to the non-rotaxane 4 counterpart. The fluorescence lifetimes of polyrotaxanes follow a mono-exponential decay with a value of τ = 1.14 ns compared with the non-rotaxane, where a bi-exponential decay composed of a main component with a relative short time of τ1 = 0.88 (57.08%) and a minor component with a longer lifetime of τ2 = 1.56 ns (42.92%) were determined. The optical and electrochemical band gaps (ΔEg) as well as the ionization potential and electronic affinity characterized by smaller values compared to the values of any of the constituents. AFM reveals that the film surface of 4a and 4b displays a granular morphology with a lower dispersity supported by a smaller roughness exponent compared with the non-rotaxane counterpart.
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Affiliation(s)
- Aurica Farcas
- Inorganic Polymers, ''Petru Poni'' Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Ana-Maria Resmerita
- Inorganic Polymers, ''Petru Poni'' Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Pierre-Henri Aubert
- Laboratoire de Physicochimie des Polymères et des Interfaces (EA 2528), Institut des Matériaux, Université de Cergy-Pontoise, F-95031 Cergy-Pontoise Cedex, France
| | - Flavian Farcas
- "Gh. Asachi" Technical University, 61-63 Mangeron Blvd, 700050 Iasi, Romania
| | - Iuliana Stoica
- Inorganic Polymers, ''Petru Poni'' Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Anton Airinei
- Inorganic Polymers, ''Petru Poni'' Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, 700487 Iasi, Romania
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Stefanache A, Balan M, Harabagiu V, Aubert PH, Guegan P, Farcas A. Electro-optical properties of aromatic oligoazomethine/permethylated α-cyclodextrin main-chain polyrotaxanes. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Poly[2,7-(9,9-dioctylfluorene)-alt-(5,5′-bithiophene/permethylated β-cyclodextrin) main-chain polyrotaxane: Synthesis, characterization and surface morphology. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2013.11.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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